161728415963 has 2 divisors, whose sum is σ = 161728415964. Its totient is φ = 161728415962.

The previous prime is 161728415939. The next prime is 161728416001. The reversal of 161728415963 is 369514827161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161728415963 - 2⁶ = 161728415899 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (161728415063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80864207981 + 80864207982.

It is an arithmetic number, because the mean of its divisors is an integer number (80864207982).

Almost surely, 2^161728415963 is an apocalyptic number.

161728415963 is a deficient number, since it is larger than the sum of its proper divisors (1).

161728415963 is an equidigital number, since it uses as much as digits as its factorization.

161728415963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The spelling of 161728415963 in words is "one hundred sixty-one billion, seven hundred twenty-eight million, four hundred fifteen thousand, nine hundred sixty-three".